BS476:Part 8:1972 Section 5 Fire resistance for Beams
BS476:Part 21:1987 Section 5 Fire resistance for Beams
FTSG Resolutions 47 & 70 Fire resistance for Beams
...
BS476:Part 8:1972 Section 5 Fire resistance for Beams
BS476:Part 21:1987 Section 5 Fire resistance for Beams
FTSG Resolutions 47 & 70 Fire resistance for Beams
...